Rediseño del sistema de tratamiento de aguas residuales para la curtiduría la Península de la parroquia Península-Tungurahua

Abstract

The objective of this work was to redesign the wastewater treatment system for "La Península" tannery in the parish of La Península-Tungurahua, thus determining the physicochemical and microbiological characteristics of the wastewater, based on the permissible limits of the Ministerial Agreement 97 Annex 1 of Book VI of the Unified Text of Secondary Legislation of the Ministry of the Environment (TULSMA): Environmental Quality Standard and Effluent Discharge to the Water Resource, Table 11: Discharge limits to the public sewage system; values were measured for BOD out of range 6. 520.00 mg/L in liming water and 1,310.00 mg/L in tanning water. The variables taken into account for the redesign of the wastewater treatment system were identified, where the primary values that influenced on the calculations and sizing of the different design stages are the design flow rates; 0.346 L/s in tanning water and 0.247 L/s in liming water. By means of calculations, the treatment plant was redesigned and the following results were obtained: one system for tanning wastewater and one for liming wastewater, where several elements of the plant were taken into account and coupled to a new proposal which includes two new settling tanks and the calculation of chemical dosages based on the design flow rates. Therefore, it was concluded that the proposed design is validated by the physicochemical characterization of the treated water based on the permissible limits of the Ministerial Agreement 097 of the TULSMA. It is recommended to take into account that the redesign of the water treatment system has been considered based on the production flows of this tannery.